基于加速度-应变联动测试系统的多层建筑破坏机理与构件行为研究  

Mechanisms Collapse of Multistory Building and Its Component Behavior Based on Acceleration-Strain Couple Testing System

作　　者：刘雪纯 郭迅[1] 罗若帆 马天贇 闫程 LIU Xuechun;GUO Xun;LUO Ruofan;MA Tianyun;YAN Cheng(Key Laboratory of Building Collapse Mechanism and Disaster Prevention,China Earthquake Administration,Institute of Disaster Prevention,Sanhe 065201,China;School of Civil Engineering,Jiaying University,Meizhou 514015,China)

机构地区：[1]防灾科技学院中国地震局建筑物破坏机理与防御重点实验室,河北三河065201 [2]嘉应学院土木工程学院,广东梅州514015

出　　处：《防灾科技学院学报》2024年第4期14-22,共9页Journal of Institute of Disaster Prevention

基　　金：中央高校基本科研业务费研究生科技创新基金(ZY20240320);国家自然科学基金(52278489)。

摘　　要：传统方法在建筑上安装加速度传感器来对结构进行强震观测,但该方法无法获得地震作用下各构件的真实地震响应,因此研发了一种加速度-应变联动测试系统。地震发生时,该系统使用强震仪触发采集,布置在构件上的应变片也将同步记录应变数据。将该系统布置在两所外廊式教学楼上对其进行地震监测,结果显示:新型加速度-应变联动测试系统能同时记录地震发生时的加速度响应和构件上应变响应,可弥补现有强震观测设备在监测结构构件地震响应方面的不足。此外,在小震作用下,填充墙的约束作用将导致底层被约束柱承担的地震剪力是裸露柱的数倍,当柱的两侧布置窗间墙时,这种内力凝聚现象将更显著。这种剪力的不均匀分布在进行结构抗震设计时常被忽略,被约束柱的抗震需求被严重低估,这将导致结构在地震作用下更易发生严重破坏,甚至倒塌。Traditionally,acceleration sensors are often installed on buildings for strong motion observation,but this method cannot capture the real seismic response of each component of buildings under the earthquake.Therefore,a new accelerationstrain synergy testing system has been developed.When an earthquake occurs,strong-motion seismographs in the system trigger the data collection,and the strain gauge arranged on the components will also simultaneously record strain data.This system is deployed on two veranda-style school buildings for earthquake monitoring.Results show that the new acceleration-strain synergy testing system can simultaneously record the acceleration response and strain response of components during earthquakes,filling the gaps in monitoring the seismic response of structural components left by existing strong motion observation equipment.Furthermore,under small earthquakes,the restraining effect of infill walls will cause the seismic shear force borne by restrained columns on the bottom floor to be several times that of bare columns.When window walls are arranged on both sides of the columns,this internal force concentration phenomenon will be more significant.The uneven distribution of this shear force is often overlooked in seismic design of structures,resulting in a severe underestimation of the seismic requirements for the restrained columns.This can lead to structures being more prone to severe damage or even collapse under the earthquake.

关 键 词：地震破坏倒塌 构件力学行为 加速度-应变联动测试系统 内力集中 强震观测 

分 类 号：TU973[建筑科学—结构工程]